The mobius are no longer keeping up with dashcams, at least not the mid / better ones.
For a race car i dont even think i myself would use a dashcam, okay for the pedal work it will be fine, heel/toe fandango the modest bitrate of dashcams can do, also filming a driver, but what the driver see i would use a action camera on as with a higher bitrate it will be able to give much more detail.
For smaller cameras something like the Street Guardian SG9663DR would be fine i recon, it is a dual remote system with the 2 cameras on a wire and a main unit with a small LCD you can mount just about where you like